I think the answer to your question is in one of your above replies. You wrote you discussed adding 15% unbalanced toppers with several Vets and about adding veggies with your own Vet!
For my pup I stick close to the 10% rule due to him being prone to adding weight during certain times of the year. For the kibble part of his diet he is on the lower end portion wise for his weight range. Along with aiming for balanced meals I pay close attention to fat calories. With his current meal plan and regular exercise so far so good.
Those are things I pay attention to when adding extras. You might have different concerns for your pup or you might not have any. If your diet plan is working out for your pup you can only see how it goes and tweak when it needs to be tweaked. 🙂
